Low Beam Intensity Control Using High Beam Status
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Solution Overview
Problem
Existing vehicular headlamp systems struggle to dynamically adjust low beam illuminating intensity, especially in situations where high beams are not used, leading to less-than-optimum illumination due to regulatory constraints and limitations in older on-off headlamp configurations, and continuously variable headlamps lack flexibility in adjusting low beam intensity for enhanced range.
Innovation Solution
A vehicular lighting system with a control unit that adjusts the illuminating intensity of low beam headlamps based on the operational status of high beam headlamps, using sensors and pulse width modulation to increase low beam intensity within legal limits when high beams are not in use, ensuring maximum permissible illumination without glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If low beam illuminating intensity is kept at maximum permitted level continuously, then illumination quality is improved, but regulatory compliance deteriorates when high beams are activated
Solution Approach 1:
The patent applies dynamics by making the low beam illuminating intensity adjustable and variable rather than fixed. The control unit dynamically changes the low beam intensity based on the operational status of the high beams, transitioning between different intensity levels to comply with regulations while maintaining optimal illumination when conditions permit
Solution Approach 2:
The patent changes the illumination intensity parameter of the low beam based on the high beam operational status. When high beams are not in use, the low beam intensity is increased to a higher level; when high beams are activated, the low beam intensity is reduced to comply with regulatory requirements, thus adapting the parameter to different operating conditions
2Illumination intensity
If low beam intensity is increased for enhanced range, then illumination coverage is improved, but glare to other drivers increases
Solution Approach 1:
The patent dynamically changes the low beam illumination intensity parameter based on the high beam operational status and ambient conditions. By adjusting the intensity to appropriate levels, the system provides enhanced illumination coverage when needed while preventing excessive glare that would harm other drivers, thus optimizing the parameter to balance illumination quality with safety
3Device complexity
If on-off headlamp configuration is used, then device simplicity is improved, but illumination flexibility deteriorates
Solution Approach 1:
The patent transitions from a static on-off headlamp configuration to a dynamic system where the low beam illuminating intensity can be continuously adjusted. The control unit enables graduated levels of illumination by varying the voltage or current supplied to the low beam filament, providing illumination flexibility while maintaining reasonable system complexity through the use of existing headlamp infrastructure
4Adaptability or versatility
If continuously variable headlamp system is implemented, then illumination flexibility is improved, but system complexity and cost increase
Solution Approach 1:
The patent applies multi-functionality by using the existing low beam headlamp infrastructure to serve multiple intensity levels. The control unit enables the low beam filament to operate at various illuminating intensities, effectively making the existing component perform multiple functions (different illumination levels) without requiring entirely new hardware, thus reducing overall system complexity
Solution Approach 2:
The system uses the existing headlamp control infrastructure and electrical system to provide the continuously variable illumination capability. By leveraging available components and circuits, the patent reduces the need for additional dedicated parts, allowing the system to achieve illumination flexibility while minimizing the increase in complexity and cost
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides enhanced illumination flexibility and range for low beams while remaining within regulatory guidelines, improving nighttime driving conditions by dynamically adjusting low beam intensity based on the operational status of high beams.
Implementation Method 1
using sensors and pulse width modulation to increase low beam intensity within legal limits when high beams are not in use
Data Source
AI summary
A vehicular lighting system includes low beam headlamps, high beam headlamps and a control unit configured so that during operation of the lighting system, the control unit determines the operational status of the high beam headlamp and selectively adjusts the illuminating intensity of the low beam headlamp. In particular, the brightness of the low beam headlamp can be increased during periods where the high beam is not being, thereby allowing the low beam to more closely approximate the brightness of the high beam, but without the glare associated with conventional high beam patterns. In this way, artificially low illuminating intensity limitations placed on the low beam headlamps can be overcome during periods where the lighting system is operating but the high beams are not in use. In one preferred configuration, at least the low beam headlamps are made from numerous individual light-emitting diodes that can be separately controlled in order to achieve the adjustments in low beam headlamp illuminating intensity.